Improvement in let-off mechanism for looms



waited Staten @tutti @twine Letters Patent No. 99,044, dated January 18,1870.

IMPROVEIVIENT IN LET-OFF MECHANISM PQR LOOMS.

The Schelule referred to in these Lettera Patent and making part of thesame.

To all whom 'it may concern Be it known that we, DANIEL LONG and JOHNPRESTON, of Fairview, in the county of Erie, and

State oi' Pennsylvania, do hereby declare that we have invented new andimproved Automatic Tension-Levers for Looms, and that the following is atrue and exact description of the same.

The nat-ure of our invention consists in providing tension-le vers forlooms,so constructed that the wei gh ts on the same are automaticallymoved by the action of the beam, so as to regulate the tension, as thewarp is unwound from the beam.

Our invention is shown in the accompanying drawings as follows, likeletters referring to like parts:

Figure 1v represents our invention as it appears in the loom.

Figures 2 and 3 are detached portions of a loomfiame, showing the pointsand manner in which our invention is attached.

Figure 4 is a sectional end view of one of the levers.

Figure 5 is a sectional view of one of the levers at the point where itis attached to the loom-frame.

In iig. 1, the brakes F and G pass around the beamroller A, and areattached, respectively, to the loops or bows D D and E E, on the leversB and C, and the cross-bar I.

Attached to the levers B and C, and working in slots, are the slides HH', to which aresuspended the weights H H, which increase or diminishthe friction upon the beam A by their tension upon the bauds F and G,which tension is regulated through the movement of the levers B and C,resulting through the movements of the screw S aud the slides R R, thelatter acting as fulcra for the levers B and C.

'lhe screw K is automatically operated by the pulley attached to shaft1n, which is connected to it by means of the joint L, attached to theshaft m, which is journaled, at the point P, upon the lug T.

This screw operates the slide H', weight H, and lever B, and also theslide H', weight'H, and lever O, on the opposite end of the loom, whichlatter are connected with `the lever Band pulley and shaft m, abovementioned by the cord or belt J, and worked by the same.

The method of .operation is as follows:

The beam A being empty, the weights H H are moved to the outer ends ofthe slots iu the levers B and C, thereby relieving the beam A from thepressure lof the brakes F and G; but, as the operator winds the so thatslide H' slips inward with the weight H, there-v by producing the propertension upon the beam or roller A. v

IVhen the operator begins weaving, the pulley attached to the shaft mrevolves the screw K, carrying the weights H H downward and outward,thereby automatically decreasing the tension upon the beam or roller ,Aas the yarn isA rolled off. y

By these devices, we secure a uniformity in the numberkof picks per inchin the cloth woven. This motion of the weights is certain and accurate,and, if the levers B and C are graduated, the operator can, at anytime,.tell exactly how many yards of cloth have been woven.

XVhat I claim, and desire to secure by Letters Patent, is-

1. The screws S S, in combination with the slides R R and levers B andC, when operated in the manner substantially as described, and for thepurpose specified.

2. In combination with the tension-bands F and G, the levers B and C,slides R R and H H', and weights H H, and screws S S, the whole arrangedand operated in the manner and for the purpose specified.

3. The levers B and O, loops or bows D D and E E, slides R R, screws SS, and slides H H', when applied to looms in the manner and for thepurpose speciiied:

DANIEL LONG. JOHN PRESTON.

Witnesses:

JNO. K. HALLocx, Guns'. P. BIDDLE.

